Machine for straightening rods and pipes.



P. B. ABRAMSEN.

MACHINE FOR STRAIGHTBNING RODS AND PIPES.

- APPLIOATlON'FILED APR.15,191&

Patented May 19, 1914.

a sums-sum 1.

INVENTOR P. B. ABRAMSBN. MACHINE FOR STRAIGHTENING RODS AND PIPES. APPLICATION FILED APR.15, 1913.

1 ,0972281 Patented May 19, 191 1 is g m; Z N 1 2 o 5 q 1 I {I ,Q I l N l Ki i a gm E: Q q N a, &' g I \a Q Q: m\ w m N w J N WITNESSES I I I INVENTOR WWW fillfifi w.

draw" A v W gi P. B. ABRAMSBN. MACHINE FOR STRAIGHTENING RODS AND PIPES APPLICATION FILED APB.15, 1913.

1 097 281 Patented May 19, 1914 3 SHEETS-SHEET 3.

WITNESSES INVENTOR PETTEB B. ABRAMSEN, 0F KNOXVILLE, PENNSYLVANIA.

MACHINE FOR STRAIGHTENING RODS AND PIPES.

Specification or Letters Patent.

Patented May 19, 1914.

Application fi1ed Apri1 15, 1913. Serial No. 761,294.

To all whom it may concern Be itknown that I, PE'I'IER a subject of the King of Norway, residing at Knoxville, Allegheny county, Pennsylvania, have invented a new and useful Improvement in Machines for Straightening Rods and Pipes, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is a plan view of a machine embodying my invention; Fig. 2 is a section on the line II-II of Fig. 1; Fig. 3 is a section on the line III--III of Fig. 1, but with the driving mechanism omitted; Fig. 4 is a perspective view of one of the adjusting wedges; Fig. is a longitudinal section of one of the longer cross-rolls; Fig. 6 is a longitudinal section of one of the shorter cross-rolls with the rolling shaft removed; and Fig. 7 is a detail view showing a modification.

My invention has relation to the class of pipe and rod-straightening machines; and is designed to provide a simple and eiiicient machine of this character by means of which the straightening of rods and pipes can be effected in a better manner than heretofore.

In straightening round bars, rods and pipes, it has been customary heretofore to revolve the bar, rod or pipe to be straightened between a pair of cross-rolls, the bar,

rod or pipe revolving and advancing through the rolls in a spiral line. It has been found that in these machines, the rod has a constant tendency to move laterally, or to assume a position parallel. to the axis of one or the other of the rolls. In this manner the effect of the pressure from the rolls is partly lost, and the rod or pipe is not properly straightened. In view of this tendency, it has been customary to provide straightenlng machines employing cross rolls with a more or less complicated system of guides designed to hold the bars to straight path. These, howe er, are objectionable, not only because they complicate the construction of the machine, but also because they mark the bars or other objects being straightened, being required to exert considerable force in order to prevent deflection of the bars.

a My invention is designed to overcome this difficulty, and it consists in the provision of two separated sets of cross-rolls, between which the rod or pipe is passed, and by which it is rigidly held at two separated points. Each set of cross rolls forms a B. ABRAMSEN,

straightening pass, and these passes coact to hold the bar or pipe being straightened against movement to one side of the axial line of the said passes without auxiliary guiding means. Intermediate of the two sets of cross-rolls, I preferably provide a relatively short pressure roll, which is preferably made adjustable for it to give any desired degree of pressure on the rod or pipe intermediate the two sets of cross-rolls.

Referring to the accompanying drawings, in which I have shown the preferred embodiment of my invention, which will now be described, the numeral 2 designates the frame of the machine, which may be of any suitable character.

3 and 4 designate the rolls of one pair of cross-rolls, and 5 and 6 the rolls of the second pair of cross-rolls. The rolls 3 and 5 are constructed with a reducing taper from each end toward the center. The rolls 4 and 6 are preferably considerably shorter than the rolls 3 and 5 and are formed with substantially straight bearing portions which are respectively opposite the centers of the rolls 8 and 5. The construction and arrangement of the two rolls of each set or pair is such that the piece to be straightened has two separated hearings on each of the longer rolls, while the shorter roll has a central bearing on the piece intermediate the two bearing points of the longer roll. The longer rolls are suiiiciently reduced in diameter at their centers so as to give a clearance or bending space opposite the bearing portions of the shorter rolls. The rolls 3 and 5 are mounted on the parallel skew shafts 7 and 8, which are journaled in suitable bearings 9 of the frame 2. The rolls 4 and 6 are journaled on short skew shafts 10, mounted in yokes 11, adapted for both longitudinal and lateral adjustment on the portion 2* of the frame. To provide for this adjustment, the outer portion of each yoke is provided with the horizontal slots 12, and the portion 2 of the frame is formed with the longitudinal slots 13. These two slots intersect with each other, and the yokes are secured in the proper adjustment by means of bolts 14;. For the purpose of adjusting theyokes laterally, I provide the longitudinally extending screw shaft 15 having thereon wedge blocks 16, which, when the shaft 15 is rotated, are adapted to force the yokes inwardly and thus move the rolls 4 and 6 toward the rolls 3 and 5.

17 designates a pressure roll located intermediate the two sets of cross-rolls and between the two rolls 4tand 6. This roll 17 is mounted in a yoke 18, which is similar to the yokes 11 before described, and is ad.

sponding pinions 26 and 27 mounted on the skew shafts 7 and Fig. 2).

The operation of the machine will be 8, respectively (see readily understood. The rod, bar or pi e,-

designated at A being fed through the ro.ls, is rigidly held against any lateral movement between the two sets of rolls 3 and 4 and 5 and 6, and is subjected, to pressure from the intermediate roll 17. The entering'end portion of the rod, bar or pipe is straightened between the second set of cross-rolls acting in conjunction with the intermediate pressure roll; While the last end of the rod, bar or pipe is straightened between the first set of cross-rolls acting in conjunction with the intermediate pressure roll. The motor 20 is preferably of the reversing type, so that if the rod, bar or pipe is not perfectly straightened in its first passage through the machine, the motor can be reversed and the rod, bar or pipe run back through the .ma-.

chine in a reversing direction.

Instead of making the longer rollsicontinuous, they may be formed in two-Sepa;

rated sections 3, 3, as shown in Fig. 7. In: this case these two sections and theopp osing short roll 4* constitute one set of cross-rolls the said sections really constituting a single roll.

The advantages of my invention result from the provision of the two separated pairs or sets of cross-rolls, the rod or pipe crossing from one set to the other, and being acted upon intermediate the two pairs or sets by the intermediate pressure roll. In this manner, any lateral movement of the rod or pipe is effectively prevented.

It will be obvious that various changes can be made 'incthe details of construction and arrangement of the various parts. Thus,

the shorter cross-rolls and the intermediate pressure roll may be mounted and adjusted in various ways; instead-of employing only two sets ofcross-r'oll's', any desired number ofsets in excessof two maybe employed;

all the rolls. may be positively} driven; any I In the drawing 1" bearing portions of the first-named roll, each.

set of rolls forming a straightening pass, and said passes coactin to hold the bar or pipe being straightened against movement to one side of the axial line of the asses without auxiliary guiding means; su stantially as described.

2. A straightening machine of the character described, comprising two separated sets of cross-rolls, the two rolls of each set having working portions opposite each other and forming between them a straightening pass, the axes of said rolls being oblique to the axis of said pass, and an intermediate pressure roll, the corresponding cross-rolls of the two sets having their axes substan tially parallel; substantially as described.

3. A straightening machine of the character described, comprising two separated sets of cross-rolls, the two rolls of each set having working portions opposite each other and. formingbetween them a straightening pass, the axes of said rolls being oblique to the axis of said pass, and an intermediate pressure roll, the corresponding cross-rolls of the two sets havingtheir axes substantially parallel, and means for positively driving one cross-roll of each set; substantially as described.-

i lzsAi-straightening, machine of the character; described comprising two separated sets of cross-rolls, the two rolls of each set having working portions'opposite each other and forming between them a straightening pass, the axes of said rolls being oblique to the axis of said pass, and an intermediate pressure roll, one cross-roll of each set befor adjusting the 'non-driven rolls and also the intermediate pressure roll toward and "away from the driven cross-rolls; substantially asdescrib'ed,

6. A straightening machine of the character described, comprising two separated sets of concave cross-rolls, the two rolls ofeach set having Working portions opposite each; other and forming. between them a straightening" pass, the axes of said rolls being'oblique to theaxis of-saidpass', an-intermediate pressure roll, means for positively drivin onecross-roll of eachset, and.

7. A straightening machine, comprising two pairs of cross-rolls,' the two rolls of each set having working portions opposite each other and forming between them a straight, ening pass,the"axes of said rolls being oblique to the axis of said pass arranged in.

tandem, thetwo rolls of each pair 'havin their centers'opposite each other, and form ing a straightening pass between them, and a pressure roll intermediate said pair-s, there being a free bending space opposite said ressure roll, and the axes of the cross-rolls eing oblique to the axis of the pass as Well as to each other; substantially as described.

8. A straightenin machine, comprising two pairs of cross-roi ls, the two rolls of each set having working portions opposite each other and forming betweenthem a" straight'- ening pass, the'axes of said rolls being oblique to the axis of said pass arranged in tandem, the tworolls of each pair having their centers opposite each other, and forming a straightening pass between them, and a-pressure roll intermediate said pairs, there being a free bending space opposite said pressure roll, and the'axes of the cross-rolls being oblique to the axis of the pass aswell as to each other, and the axis of the pressure'roll being substantially parallel to the axis of onecross-roll of each pair; substantially as described. 1

9. A straightening machine having two pairs ofcross rolls arranged in tandem, one

roll-of each )air having a reducing taper from each en toward the center to give two separated bearings on the roll for the piece to be straightened, and the other roll of each pair having its effective bearing intermediate he-two bearings of the first named roll, the atterroll being reduced in diameter at its central portion to give a free bending space op osite the effective portion of the second rol "substantially as described.

In testimony whereof, I have hereunto set I my hand, I I

H I .PETTER B. ABRAMSEN -Witnesss:

p GEO. B. BLEMING,

' 5 GEo. H. PARMELEE. 

